Revolving screen.



F. M. WELCH. RBVOLVING SCREEN. APPLICATION HLBD sEPT.4,1912.

1,066,558. Patented .Iu1y8,1913` 2 sHEBTs-sHBBT 2.

STATES PATENT OFFICE.

:FRANK WELCH, F TIFFIN, OHIO, ASSIGNOR T0 THE WEBSTER MEG, CQMBNY". AOF TIFFIN, OHIO, A CORPORATION OF OHIO.

nnvoLvING scnEnN.

Specication of Letters Patent.

Application med september 4, 1912. serial No. 718,478.

To all 'whom t may concern:

Be it known that I, FRANK M. WEDCH, a citizen of the United States, residing at limit, in the county of Seneca and State of iK'hiO, have invented cert-ein new and usethe object of my invention is to provideV f a screen of this character which will be highly ellicient, compact, economical in the power 'required to operate the same, and cheap to construct.

A further object of my invention is to provide a screen with which the material being treated can be seperated and graded es to fineness, the number of separetionsA of which can be varied as desired.

With these and other objects in view my invention consists in certain constructions, combinations and arrangements of parts, the preferred form of which will be first described in connection with the accompanying drawings, and then the invention particularly pointed out in lthe appended clanns. v

Referring to the drawings wherein the same part is designated by the same reference numeral wherever it occurs, Figure 1 is a, side elevation of the revolving screen showing the preferred embodiment of my invention; Fig, 2 is an end view lof the re ceiving end of the screen; Fig. 3 lis a section takenon line X--X of Fig. 1, and Fig. 4 is a. longitudinal section of a. modification ,of my invention in which the screen is mounted on n longitudinal shaft.

The revolving screen is shown as composed of a section 5; a section 6 and a section 7 connected together end to end, the section 5 being of the finest mesh, the section 6 being of intermediate mesh, and the section 7 having the coarscst'niesh. This cylindrical screen is mounted in en inclined position, so that the material which cannot pass through the screen openings will, as the screen is revolved, pass from the section 5 to the section 7. I have shown the upper end of the section 5 as provided with a material receiving section 8, to which material is fed by means of the hopper 9 extending into the central opening 10 of the receiving section 8. 11 designates a frusto conical section of Patented July e, 1913.

screen which snrroundsthe section 5,

the larger end of the section surrounding"Y the upper or receiving port-ion of the sec` tion 5 and the smaller end of the section 11 secured around the lower end of the sectionv 5.- The angle between the section'5 and the section 11 is such that the lower portion of" the section 11 inclines in the oppositedi rection from the incline of section 5.' I have also shown the larger end of the sec tion 11 as provided wit-h an outwardly ex tending flange 12 adapted to run on flanged supporting wheels 12', with the'lwer end of the section 7 rovided with a' similar flange 13 adaptedj to run upon flanged wheels 13. `I have also shown a sprocket wheel 14 surrounding the joint between the' sections 6 and 7, to which power may be applied by means of the sprocket chain 15,

-and the screen revolved.' I have also shown receiving hoppers 16, 17 and 1,8, mounted beneath the screen hopper 16 to'catch ma! terial passing through the conical sec-tion. 11; the hopper 17 to catch, the material passing through thesection 6 and the1hopper 18 to catch the material passing through the section 7 the material. which is so coarse' as not tfo pass throughnny of the screen sections being delivered to a chute 19 extending into the lower end of the' screen section 17 and the material sufficiently tine to pass through the section 5 but not fine enough to pass through the conical section 11 is delivered to the spout 20 extending' into the space between the section 5 and the section 11'at the upper end of the screen.

The' material receiving section 8, as will be noted, extends a substantial distence wit-hinthe frusto conical section l1, therehy' serving to conduct the materiel toward the` rear of the first section 5 to which it iscon;

nccted with the result that slich material as passes through the mesh of said section 5 is deposited well up toward the upwardly in-r InA the operation `power is applied by means of the driving chain 15, and the material to be separated is fed int-o the screen through the hopper- 9. .After the material remembered, is of 'finer mesh than the sec-V tions 6 and 7, butnot as fine as the conical sect-ion 11. Consequently the ne portion of the material to bev separated will drop through thc'openingsin the screen 5 and onto the conical sect1-on 1.1. That portion of,-

the material which is too coarseto passi pass through the section 5 but small enough through the screen 11 will be delivered to the chute 20 While the material sufficiently tine to pass through thevscreen 1l willhe delivered to the receivinghopper 1G. After the material in section 5 has been separated from all of its fine particles the materialreA ma-ining enters the section G, which is a coal-ser screen than the section 5, and con.- sequently all the material while too large to to` pass through the 'mesh of the sectioir will be delivered to the receiving hopper 17. The material which is too 'coarse to pass through the mesh of the section (j will then pass down into the screen section 7. it will be again separated, the finer portion being delii-credinto the hopper 1S and that portion which `is too coarse for the mesh of any of the screens passingv out into the chute 19.

The foregoing construction isfused where five separations are desired.v Additional separationsvcan beeffected byadding screen sections .to the' end of theseetion 7, and fewer separations can be effected by removingY merely section 7, or both'sections 6 and 7.

In the latter caso, the liiaterial will be separated lnto threev grades.

I realize that v considerable variation is Here possible in the detailsof construction and arrangement of parts Without departing from the spirit of my invention, and I therelfore do not intend to limit myself to the passes Afrom -the receiving section 8 it en-A. ters the screen section 5, which, it- Will be specc form shown and described.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: Y v

.1. In an apparatus of the character deascribed, the combination with an inclined 'cylindrical screen having. an imperforate.

section attached to its feed-end and eX-tend ing a relatively .substantial distance therefrom, of a frusto-conical screensection surrounding the feed-end of said cylindrical screen and the imperforate section attached thereto, the said frusto-coni'cal section having,T its contracted end extending toward the discharge vend of-s'aid cylindrical section, the imperforate section of said cylindrical screeneXtending Well within said conical section, for the purpose set forth.

2. In an apparatus 'of the character described, the combination Withaninclined cylindrical screen, of animperforate sect-ion within which the feed-end vof said cylindricalscreen is lattached, the said imperforate section surrounding the feedend of said cylindrical screen,and extending a relatively substantial distance therefrom, and af conical screen section surroundingthe feed-end of said lcylindrical section and the imperforate extension secured thereto, the imperfoi-ate section of said cylindrical screen ex-' 

